spun rod bearing?

**gsrb20z** · 04-29-2006, 01:49 PM

i pulled the bearings out of my b20z(stock) bottom w/ gsr head, what do you think? one of them on the outside of the bearing is like copper color compared to the others, the insides look almost all the same and the crank seems fine smooth like glass on journals, no metal pieces or no wear and i was using a type r oil pump just in case you needed to know, whats the cheapest thing i can do.. help please!

**B20Si** · 04-30-2006, 03:12 AM

Make sure you use arp rod bolts in the bottom end. The stock ones were never meant to handle the punishment. If you don't you have a high probability of spinning a bearing.

**bambam** · 04-30-2006, 08:22 AM

Originally Posted by gsrb20z

i pulled the bearings out of my b20z(stock) bottom w/ gsr head, what do you think? one of them on the outside of the bearing is like copper color compared to the others, the insides look almost all the same and the crank seems fine smooth like glass on journals, no metal pieces or no wear and i was using a type r oil pump just in case you needed to know, whats the cheapest thing i can do.. help please!

was the motor making noise? You would know if you spun a bearing. A spun bearing is just that...a bearing that has spun around the crank, and out of it's normal position....usually because you either sretched or broke a rod bolt from revving too high.

**gsrb20z** · 04-30-2006, 10:13 AM

first i overrevved it past 9 grand.........drove fine for like 2 days( after i did that i was afraid to get on it for a while) then i said oh it will be fine ran my friends turbo civic and it started makin metal sorta grinding/rubbing noises, barely made it home...it wanted to start... but the noise sounded like it was commin f/ the block definately and i did put arp rod bolts in it before, maybe they ewrent torqued enough.....thanks for the advice.

**lilracer123** · 05-14-2006, 08:14 PM

maybe u should pull the motor apart...

**Soroush** · 05-15-2006, 02:42 AM

I can't see a picture. I don't know if you posted any or not. But, what bearings did you use?

It seems to me like you used tri-metal bearings and chewed through the babbitt layer and exposed the copper-lead layer. Have the rod big ends machined after you install aftermarket rod bolts to make sure they're round.